1) Oceans play a crucial role in regulating the Earth's climate by absorbing and storing large amounts of heat and carbon dioxide.

2) The eye of a cyclone is a region of calm, relatively clear skies and light winds at the center of the storm.

3) The Mariana Trench in the western Pacific Ocean is the deepest part of the world's oceans, reaching a depth of approximately 36,070 feet (10,994 meters).

4) The Earth's core is hotter than the surface of the Sun.